Typographical line-casting machine



May 7, 1929. J. G. w. FIELD I TYPOGRAPHICAL LINE CASTING MACHINE FiledFeb. 4, 1928 [72216725077 M f 22 m WW4 Patented May 7, 1929.

UNITED. STATE-S PATENT oFF1c.E.

JOSEPH GBACIE WINTER FIELD, or ALTRINCHAM, ENGLAND, ASSIGNOB 'roLINOTYPE AND MACHINERY LIMITED, or LoNDo ENGLAND.

TYPOGRAPHICAL LINE CASTING MACHINE.

Aplication filed February 4, 1928, Serial o. 251,921Qana. in GreatBritain flctober- 31, 1927.

This invention relates to typographical line casting machines and moreparticularly to machines which are adapted to cast lines or slugs ofdifferent sizes varying over a wide range up to those now commonly usedfor display and similar Work. In a machine of this particular character,the quantity of metal to be pumped into the mould for the production ofany given cast slug Varies according to the size of said slug,-theproduction of aslug of say 36 point taking a much larger 'volume ofmetal than is necessary for producing one'ofsay letter press size. Forthat reason a pump adapted to deliver metal into a mould of a lessersize, cannot always be relied upon to deliver the metal at the speednecessary to ensure the production of a good. printing face on slugs ofthe larger sizes. f In the construction to which the present inventionisapplied the pumpingmeeh anism is so arranged that it can bereadilyadjusted to suit the different requirements involved inf'the'production of the various sizes of slugs within the capacity of eachmachine.

In said construction the ordinary spring and cam actuated pump lever issupplemented by another lever acted upon by a separate spring andadapted to be placed in and out of operative connection with thefirst-named lever according respectively to whether a large or smallslug is to be produced, and in such manner that when the two said leversare operativelyconnected together, as when the larger slugs have to beproduced, the two springs act in concert to carry the pump plungerthrough its metal ejecting stroke, whereas when there is no suchassociation (as when the smaller size slugs have to be produced) thesaid plunger is operated by only its own particular spring which, asordinarily, is ample for that purpose. The last namedoperation isprovided for by preventing the actuation of the supplemental lever, thisbeing effected by inter.- posing a manually adjustable stop in thedownward path of said lever.

The object of the present invention is so to construct the stop devicesthat when these devices are adjusted for preventing the actuation of thesupplemental spring, the supplemental lever arm to which this spring isattached, will be lifted out of operative contact with the leverunderlying it. Such an arrangement attains the very desirable result ofrelieving the pump-actuating cam of the pressure which otherwise wouldbe exerted on it when the smaller size slugs have to be produced, thatis to say when the pressure of a single spring sufiices for ejectingthenecessary amount of molten metal.

The invention will now be described by reference to the accompanyingdrawings in which V c Figure 1 is a side elevation of the iin proveddevices with parts of the machine frame shown in vertical section, and

Figure 2 is a plan of the same with parts omitted.

.1 isthe pump lever which is fast to the pump lever shaft 2 and which israised by a cam 11 acting against an anti-friction roller 3. 4: is theordinaryspring lever arm which also is fast to the shaft 2, and to whosefree end is attached the upper endof a spring 5 whose lower end isanchored to a hook 6 adjustable in astationary bracket 7. c

8 is the supplemental lever arm which is loosely pivoted on shaft 2 andwhich, overlaps the lever'arm 4 and acts on the latter through ascrew .9adjustable in the said arm 8. To the free end of the lever arm 8 isattached the upper end of a spring 10 whose lower end like that of thespring 5 is adjust-ably attached to the bracket'7.

17 is the stop whose deflected lower end 12 can be moved into and out ofengaging relationship with the lever arm 8. The upper end of the stop 17is pivotally attached by a pivot pin 17 to the short arm of a hand lever18 which is free to turn upon a. stationary pivot 19 fast to the fixedframe 15, and whose longer-arm capable of being swung within a slot l5from one to the other of the two terminal positions in which it isindicated in the drawing. The ends of the slot, marked 15*, serve tolimit the swing of the hand lever 18, and just below the upper of theseends there is provided adetent or spring-pressed plunger 20 (shown moreor less diagrammatically in Fig. 1) of any desired construction, foryieldingly retaining the lever 18 against accidental displacement, l

The short arm of the hand lever 18 has fast therein, a stud 21 which isadapted to engage withthe stop 17 when this lever is approaching itserect or upper position and to thereafter swing said stop out ofengagement with the lever arm 8. During the reverse movement of the handlever 18 the stud 21 recedes in advance of the stop 17 and allows thedeflected lower end 12 of the latter to pass beneath the arm 8, and thecontinued movement of the hand lever 18, through the then ascendingpivot 17, raises the stop 17 and with it the arm 8 and screw 9 so as tolift the latter out of contact with thelever arm 4 which is therebyrelieved of the supplemental pressure of the spring 10.

The axes of the two pivots l7 and 19 are so disposed relatively to eachother and to the stopping or operative position of the deflected end 12that just prior to the stop reaching the last-named position, the saidaxes pass dead centre with the result that the spring 10 will retain thehand lever 18 in its depressed position until such time as it ismanually raised for releasing the lever arm 8 and the said spring 10associated therewith.

The drawing represents the improved devices in their two terminalpositons, in chain lines in the operative position and in full lines inthe inoperative or off position.

Having described my invention, I declare that what I claim and desire tosecure by Letters Patent is 1. In a typographical line casting machine,the combination with a spring-actuated pump mechanism, and additionalspring devices adapted to supplement that mechanism, and meansadjustable at will to permit or prevent this supplemental actuation, ofmeans whereby the pump-actuating cam is relieved of the pressure of thesupplemental spring throughout all such time as the additional spring isprevented from acting on the pump mechanism.

2. In a typographical line casting machine, the combination with devicesaccording to claim 1, and in which one of the springs exerts itsinfluence through an arm, and the supplemental spring exerts itsinfluence through a second arm overlying the first arm, of astop movableinto and out of engagement with the second arm, and means whereby thestop raises said second arm during its movement into engagementtherewith. v

3. In a typographical line casting maing to claim 1, and in which one ofthe springs exerts its influence through an arm, and the supplementalspring exerts its influence through a second arm overlying the firstarm, of a stop movable into and out of engagement with the second arm,means whereby the stopraises said second arm during its movement intoengagement therewith, and means whereby when the stop is engaged withthe second arm, the supplemental spring serves for resiliently retainingit in such engagement.

4. In a typographical line casting machine, the combination with a pumplever, a spring lever arm operatively fast to the pump lever, a springacting on the lever arm, a supplemental lever arm overlying the firstlever arm, a spring acting on the supplemental arm, a stop movable intoengagement with the supplemental lever arm to lift it out of operativecontact with the first lever arm underlying it, and prevent it frombeing actuated by its spring, a hand lever turning about a fixed axis,and a pivot for the stop on the hand lever, the axis of said pivot beingso related to the fixed axis that dead center is passed during themovement of the hand lever from one position to another.

5. In a typographical line casting machine, the combinationwith a pumplever, a spring lever arm operatively fast to the pump lever, a springacting on the lever arm, a supplemental lever arm overlying the firstlever arm, a spring acting on the supplemental arm, a stop movable intoengagement with the supplemental lever arm to lift it out of operativecontact with the first lever arm underlying it, and prevent it frombeing actuated by its spring, a hand lever turning about a fixed axis, apivot for the stop on the hand lever, the axis of said pivot being sorelated to the fixed axis that dead centre is passed during the movementof the hand lever from one position to another, and a stud on the handlever movable from a position in which it is clear of the stop to aposition in which it can swing said stop out of engagement with thesupplemental lever arm, and vice versa. I p

In witness whereof I have aflixed my signature hereto.

chine, the combination with devices accord- JOSEPH GRACIE WINTER FIELD.

